砺世磨钝

Explanation: Incentive secular, honing dull 　　Usage: Joint type; as the predicate attribute; with compliment 　　Source: Guan Song, "Under Bureaucracy": "Peerage and who, the world of the grindstones, so grind the sage who is also the world blunt." 　　Examples: Yang Wen matter to see me the right meaning emperor, ~, encouraged by the shock advised. ★ Qing Shi Dai "Preface" Thesaurus:  Lishimodun